An intuitive, flexible program for producing graphs of implicit relations. Graph equations encountered in the secondary pre-calculus math curriculum: linear functions, polynomial functions, conics, trigonometric functions, exponential functions, relations involving absolute value, etc. A demo version is available here for downloading, and a site license can be purchased for integration into the high school curriculum. View images of screens produced by the program, and browse a gallery of graphs demonstrating its visual range. GrafEq has English, French, and Dutch interfaces.